id:A073892 - OEIS Search Results

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a(1) = 1, a(2n) = a(2n-1) + p(n) and a(2n+1) = a(2n) - c(n), where p(n)=A000040(n) and c(n)=A002808(n) are the n-th composite and n-th prime numbers, respectively.

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1, 3, -1, 2, -4, 1, -7, 0, -9, 2, -8, 5, -7, 10, -4, 15, 0, 23, 7, 36, 18, 49, 29, 66, 45, 86, 64, 107, 83, 130, 105, 158, 132, 191, 164, 225, 197, 264, 234, 305, 273, 346, 313, 392, 358, 441, 406, 495, 459, 556, 518, 619, 580, 683, 643, 750, 708, 817, 773, 886, 841, 968 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`All terms from a(18) onward are positive.`
	CROSSREFS	`Cf. A073891.` `Sequence in context: A083110 A059016 A080418 this_sequence A004608 A117905 A133445` `Adjacent sequences: A073889 A073890 A073891 this_sequence A073893 A073894 A073895`
	KEYWORD	`sign`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 17 2002`
	EXTENSIONS	`Edited by Dean Hickerson (dean(AT)math.ucdavis.edu), Oct 13 2002`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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